Again an interesting choice of wording.
The NTSB did a full fractographic and electron microscope scan of the surface of the vertical stab and there was no dangerous level of fatigue observed.
Someone decided days after the accident, after the tail had been in the water, that there was no "dangerous" level of fatigue, and by ONLY scanning the surface. It is NOT the surface I was concerned about, but the structure and attachments etc.
We just had a strong wind here, which sadly (not really true) snapped off and brought down on our house a big old gum tree. The wind brought the tree down, however I think the tree was rotten through and through, and it was only a matter of time before we had a strong wind.
I would get the NTSB to carry inspections to determine the cause of this disaster, but why bother, they will only spend a fortune looking at the bark of the tree, find nothing wrong with the bark, and blame the wind.